CVE-2026-23679 PUBLISHED

libusb < 1.0.30 NULL Pointer Dereference in parse_interface()

Assigner: VulnCheck
Reserved: 14.01.2026 Published: 27.05.2026 Updated: 27.05.2026

libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength exceeds the remaining buffer size, causing parse_interface() to return early without allocating the endpoint array. Attackers can exploit this flaw through libusb_get_active_config_descriptor or libusb_get_config_descriptor by providing crafted descriptors via virtualized USB passthrough, file-based descriptor parsing, or network sources, causing any application iterating over endpoints to dereference a NULL endpoint pointer and crash.

Metrics

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 6.9

Product Status

Vendor libusb
Product libusb
Versions Default: affected
  • affected from 0 to 1.0.30 (excl.)

Credits

  • djnn finder

References

Problem Types

  • Out-of-bounds Read CWE